Table 2.
Summary of maximum r2 and minimum RMSE (%) and corresponding optimum voxel size, for 3DVI, and k, for 3DPI, for the linear regression between the corresponding index and above-ground biomass measured in EXP3 for each sample event shown in Figure 11.
| 3DVI | 3DPI | ||||||
|---|---|---|---|---|---|---|---|
| Sample date | Zadoks development stage | Optimum voxel size (mm) | RMSE (%) | r2 | Optimum k | RMSE (%) | r2 |
| 2015-09-11 | Z23 | 50 | 37.48 | 0.19 | 2.25 | 34.99 | 0.02 |
| 2015-09-24 | Z31 | 110 | 24.07 | 0.50 | −1.50 | 23.46 | 0.48 |
| 2015-10-07 | Z32 | 165 | 31.26 | 0.50 | −0.75 | 32.73 | 0.45 |
| 2015-10-14 | Z42 | 160 | 18.30 | 0.44 | 2.0 | 20.21 | 0.32 |
| 2015-10-23 | Z55 | 75 | 13.61 | 0.53 | 1.50 | 12.52 | 0.60 |
| 2015-10-30 | Z65 | 55 | 13.90 | 0.59 | 0.50 | 10.94 | 0.74 |
| 2015-11-23 | Z85 | 50 | 12.89 | 0.67 | 0.50 | 11.04 | 0.76 |
| 2015-12-08 | Z91 | 95 | 14.04 | 0.67 | 1.50 | 14.29 | 0.65 |
| Overall | All | 130 | 31.65 | 0.81 | −1.50 | 38.25 | 0.73 |
| Overall pre-anthesis | ≤Z65 | 80 | 24.10 | 0.86 | −0.50 | 25.43 | 0.85 |
| Overall post-anthesis | >Z65 | 75 | 16.06 | 0.54 | 0.75 | 13.33 | 0.68 |
Optimum parameters are also calculated for all the sampling dates (overall), pre-and including anthesis and post-anthesis.